Encapsulated Passivation of Perovskite Quantum Dot (CsPbBr3) Using a Hot-Melt Adhesive (EVA-TPR) for Enhanced Optical Stability and Efficiency

The notable photophysical characteristics of perovskite quantum dots (PQDs) (CsPbBr3) are suitable for optoelectronic devices. However, the performance PQDs is unstable because their surface defects. One way to address instability passivate using different organic (polymers, oligomers, and dendrimers) or inorganic (ZnS, PbS) materials. In this study, we performed steady-state spectroscopic investigations measure photoluminescence (PL), absorption (A), transmission (T), reflectance (R) ethylene vinyl acetate/terpene phenol (1%) (EVA-TPR (1%), EVA) copolymer/perovskite composites in thin films with a thickness 352 ± 5 nm. EVA highly transparent its large band gap; furthermore, it inexpensive easy process. compatibility between should be established; therefore, series analyses was compute parameters, such as gap, coefficients absorbance extinction, index refractivity, dielectric constant (real imaginary parts), from data obtained above investigation. Finally, optical conductivities were studied. All these showed that EVA/PQDs more efficient stable both physically optically. Hence, could become active materials devices, solar cells perovskite/polymer light-emitting diodes (PPLEDs).